Less than EK, EY, TK etc. is a bit of a joke, 45.000€ gross for a FO is less then most LoCos like WIZZ or Germania are paying and 15 days off is nothing like part time.
Unless you are very optimistic, it seems quite unlikely that new a/c are coming.
But lets give it a try and you see what you are getting, it all depends on your alternatives.